<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        * {
            margin: 0;
            padding: 0;
        }

        .box {
            width: 100px;
            height: 100px;
            background: #eee;
            margin: 0 auto;
        }
    </style>
</head>

<body>
    <div class="box"></div>
    <button class="btn">点点点</button>

    <script src="../js/jquery.js"></script>


    <script>
        console.log($(".box").width());
        console.log($(".box").outerWidth())
        $(".btn").click(() => {
            $(".box").offset({
                left: 300
            })
        })

    </script>
</body>

</html>